C++ 读写文件

#include<iostream>
using namespace std;

/*
*/
void write(int *p, char *path) {
    FILE *fp;
    if ((fp = fopen(path, "wb")) == NULL) {
        cout << "文件打开失败！" << endl;
        exit(0);
    }

    if (fwrite(p, sizeof(int), 1, fp) != 1) {
        cout << "写入失败！" << endl;
    }
    fclose(fp);
}

int read(char *path) {
    int a;
    FILE *fp;
    if ((fp = fopen(path, "r")) == NULL) {
        cout << "文件打开失败！" << endl;
    }

    fseek(fp, 0L, SEEK_END);
    int len = ftell(fp);
    rewind(fp);

    if (fread(&a, 1, len, fp) != len) {
        cout << "读取失败" << endl;
    }
    fclose(fp);

    return a;
}

int main() {
    //char *name = "I'm a student.李雷";
    char *path = "./test.txt";
    int b = 22;
    write(&b, path);

    //char *content;
    int a;
    a = read(path);

    cout << "content:" << a << endl;

    return 0;
}